The Milwaukee 2719 M18 Fuel™ Hackzall® Is The Fastest Cutting and Most Powerful One-Handed Reciprocating Saw. Utilizing A Powerstate Brushless Motor and A Best In Class 7/8 In. Stroke Length, The M18 Fuel™ Hackzall® Cuts Up to 50% Faster Than Competitors. The Compact, One-Handed Design Provides Superior Control and The Ability to Make Cuts In Tight Spaces. The Dual Gear Counter Balance Mechanism Provides Up to 4X Lower Vibration Than Traditional Reciprocating Saws, Resulting In Faster Cut-Starts In Metal A